package com.jewelry.controller.alipay.controller;

import com.alipay.api.AlipayApiException;
import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import com.jewelry.controller.alipay.config.AlipayConfig ;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.PrintWriter;

@WebServlet("/trade/pay")
public class TradePayController extends HttpServlet {
    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        //获得初始化的AlipayClient
        AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, AlipayConfig.app_id, AlipayConfig.merchant_private_key, "json", AlipayConfig.charset, AlipayConfig.alipay_public_key, AlipayConfig.sign_type);

        //设置请求参数
        AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
        alipayRequest.setReturnUrl(AlipayConfig.return_url);
        alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

        request.setCharacterEncoding("utf-8");
        //商户订单号，商户网站订单系统中唯一订单号，必填
        String out_trade_no = new String(request.getParameter("orderId").getBytes("ISO-8859-1"),"UTF-8");
        //付款金额，必填
        String total_amount = new String(request.getParameter("total").getBytes("ISO-8859-1"),"UTF-8");
        //订单名称，必填
        String subject = new String(request.getParameter("name").getBytes("ISO-8859-1"),"UTF-8");
        //商品描述，可空
        String body = new String(request.getParameter("subject").getBytes("ISO-8859-1"),"UTF-8");

        alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                + "\"total_amount\":\""+ total_amount +"\","
                + "\"subject\":\""+ subject +"\","
                + "\"body\":\""+ body +"\","
                + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

        //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
        //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
        //		+ "\"total_amount\":\""+ total_amount +"\","
        //		+ "\"subject\":\""+ subject +"\","
        //		+ "\"body\":\""+ body +"\","
        //		+ "\"timeout_express\":\"10m\","
        //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
        //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

        //请求
        String result = null;
        try {
            result = alipayClient.pageExecute(alipayRequest).getBody();
//            System.out.println("result = " + result);
        } catch (AlipayApiException e) {
            throw new RuntimeException(e);
        }

        //输出
        response.setCharacterEncoding("utf-8");
        response.setContentType("text/html");
        PrintWriter out = response.getWriter();
        out.println(result);
    }
}
